Abstract: A cylindrical net body using helical wire members that can be easily assembled and disassembled at a working site. The invention provides also a cylindrical net body using helical wire members that have high tenacity and high durability and yet can reduce the weight. Wire members having a predetermined outer diameter are wound in predetermined lead and predetermined pitch to provide helical wire members in such a fashion that a diameter of a helix is about twice the outer diameter of the wire members, crests and troughs have substantially a similar shape, and each trough is positioned outside the center of the helix. The helical wire members are wound into a coil shape to form transverse helical wire members. Longitudinal helical wire members formed of the helical wire members are united and fixed side by side with the transverse helical wire members, with predetermined gaps, to form a cylindrical net body.

Abstract: A method and device for rotating and machining bar material which comprises holding a disc-shaped rotor rotatably around a horizontal axis, providing a pair of rails which are radially opposite to each other and have chord-shaped sliding surfaces in parallel with each other in the vicinity of the peripheral edge of the front end of said rotor, engaging tool holders slidably with each of said pair of rails, fixing a pair of tools securely by said tool holders, feeding a workpiece of bar material toward the center of rotation of the rotor, holding the workpiece securely between the tools, and rotating the rotor to displace the tools in the directions opposite to each other along the rails.

Abstract: This invention provides a panel body that can be easily assembled by using helical wire members having an excellent working factor. The invention provides also a panel body using helical wire members having excellent impact resistance. Wire members having a predetermined outer diameter are wound in a predetermined lead and pitch to provide a large number of helical wire members in such a fashion that a diameter of a helix is about twice the outer diameter of the wire members, crests and troughs have substantially a similar shape, and each trough is positioned outside the center of helix. A first fixing frame has first fixing bars fitted thereto, which first fixing bars are fitted with predetermined gaps to frame members opposing each other with a predetermined gap between them, and engage with the troughs positioned on the side of one of the surfaces of the helical wire members. Second fixing bars are fitted with predetermined gaps between the frame members of a second fixing frame.